On the origin and evolution of Antarctic Peracarida (Crustacea, Malacostraca)

Brandt, Angelika

doi:10.3989/scimar.1999.63s1261

Cited by 76 publications

(60 citation statements)

References 64 publications

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“…Moreover, no studies have addressed exclusively distribution patterns of the isopod fauna. The areas studied most thoroughly in terms of the Southern Ocean Isopoda species richness are large basins, including the Ross Sea (Choudhury and Brandt 2009), the Weddell Sea (Brandt 1992), the Bellingshausen Sea (Brandt 1999) and the region of the South Shetland Islands (Castello 2004). Some recent studies tackled also the deep-sea isopod fauna from different parts of the Southern Ocean (e.g.…”

Section: Introductionmentioning

confidence: 99%

Low abundance and high species richness: the structure of the soft-bottom isopod fauna of a West Antarctic glacial fjord

et al. 2017

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Isopods belong to the most speciose groups of the Antarctic benthic fauna, although the knowledge on their diversity and small-scale distribution patterns is still limited. Here we analyze the diversity of the isopod fauna in the Admiralty Bay, a glacial fjord on the King George Island. The basin is located in the region of the Antarctic Peninsula, the fastest warming area of the Southern Ocean. The study provides important baseline data for future research, particularly with respect to temporal fluctuations in benthic fauna, associated with global changes observed in that part of the world. Forty species of isopods representing 19 families were recorded on the soft bottom of the Admiralty Bay. The analyses were based on 99 quantitative samples collected, within the 20-502-m depth range, with a 0.1 m 2 van Veen grab. The materials for the analyses were obtained in the austral summer seasons of 1984/1985 and 1985/1986. The data revealed a high number of isopod species occurring at a low abundance, the mean abundance amounting to 4.8 ± 8.6 ind./0.1 m 2 . Most of the species occurred at low abundances, 25% of the species being represented by singletons. Caecognathia polaris, the most abundant species, showed the mean abundance of merely 1.2 ± 4.2 ind./0.1 m 2 . Species richness, diversity and abundance of the isopod fauna were much higher in the central basin of the Admiralty Bay than in the Ezcurra Inlet, an area affected by a strong disturbance of glacial origin.

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Section: Introductionmentioning

confidence: 99%

Low abundance and high species richness: the structure of the soft-bottom isopod fauna of a West Antarctic glacial fjord

et al. 2017

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“…Amphipoda are most diverse with 821 species in the Southern Ocean (De Broyer and Jazdzewski 1996), while 365 species of Isopoda are known for this area (Brandt 1999). Cumacea are represented with 66 species (87 including the Magellan area, Mühlen-hardt-Siegel 1999), whereas Mysidacea and Tanaidacea are represented with 59 and 36 species, respectively (Brandt et al 1998;Schmidt and Brandt 2001).…”

Section: Introductionmentioning

confidence: 99%

Composition and distribution of the peracarid crustacean fauna along a latitudinal transect off Victoria Land (Ross Sea, Antarctica) with special emphasis on the Cumacea

et al. 2007

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The following study was the Wrst to describe composition and structure of the peracarid fauna systematically along a latitudinal transect oV Victoria Land (Ross Sea, Antarctica). During the 19th Antarctic expedition of the Italian research vessel "Italica" in February 2004, macrobenthic samples were collected by means of a Rauschert dredge with a mesh size of 500 m at depths between 85 and 515 m. The composition of peracarid crustaceans, especially Cumacea was investigated. Peracarida contributed 63% to the total abundance of the fauna. The peracarid samples were dominated by amphipods (66%), whereas cumaceans were represented with 7%. Previously, only 13 cumacean species were known, now the number of species recorded from the Ross Sea increased to 34. Thus, the cumacean fauna of the Ross Sea, which was regarded as the poorest in terms of species richness, has to be considered as equivalent to that of other high Antarctic areas. Most important cumacean families concerning abundance and species richness were Leuconidae, Nannastacidae, and Diastylidae. Cumacean diversity was lowest at the northernmost area (Cape Adare). At the area oV Coulman Island, which is characterized by muddy sediment, diversity was highest. Diversity and species number were higher at the deeper stations and abundance increased with latitude. A review of the bathymetric distribution of the Cumacea from the Ross Sea reveals that most species distribute across the Antarctic continental shelf and slope. So far, only few deep-sea records justify the assumption of a shallowwater-deep-sea relationship in some species of Ross Sea Cumacea, which is discussed from an evolutionary point of view.

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“…The origin of the genus Austrofilius is more probably the Southern margin of the Gondwana continent during the Jurassic or lower Cretaceous (Mesozoic); it presumably expanded throughout Africa and the Northern hemisphere after the South Atlantic opened and joined the North Atlantic during the upper Cretaceous (Maldonado, 1989). This origin also would account for its presence in Antarctica, as in the case of several families of Sphaeromatidea (Serolidae, Bathynatallidae, and Plakarthriidae) and Valvifera (Arcturidae) (Brandt, 1999). Winkler and Brandt (1993) and the present study.…”

Section: Discussionmentioning

confidence: 93%

A new species of <i>Austrofilius</i> (Crustacea, Isopoda, Janiridae) from Western Mediterranean

Castelló¹

2002

Sci. Mar.

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On the origin and evolution of Antarctic Peracarida (Crustacea, Malacostraca)

Cited by 76 publications

References 64 publications

Low abundance and high species richness: the structure of the soft-bottom isopod fauna of a West Antarctic glacial fjord

Low abundance and high species richness: the structure of the soft-bottom isopod fauna of a West Antarctic glacial fjord

Composition and distribution of the peracarid crustacean fauna along a latitudinal transect off Victoria Land (Ross Sea, Antarctica) with special emphasis on the Cumacea

A new species of <i>Austrofilius</i> (Crustacea, Isopoda, Janiridae) from Western Mediterranean

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